import evp from "../evp_bytestokey";
import * as ciphers from "../browserify-aes";
// adapted from https://github.com/apatil/pemstrip
var findProc = /Proc-Type: 4,ENCRYPTED[\n\r]+DEK-Info: AES-((?:128)|(?:192)|(?:256))-CBC,([0-9A-H]+)[\n\r]+([0-9A-z\n\r+/=]+)[\n\r]+/m;
var startRegex = /^-----BEGIN ((?:.*? KEY)|CERTIFICATE)-----/m;
var fullRegex = /^-----BEGIN ((?:.*? KEY)|CERTIFICATE)-----([0-9A-z\n\r+/=]+)-----END \1-----$/m;
export default (function (okey, password) {
    var key = okey.toString();
    var match = key.match(findProc);
    var decrypted;
    if (!match) {
        var match2 = key.match(fullRegex);
        decrypted = Buffer.from(match2[2].replace(/[\r\n]/g, ''), 'base64');
    }
    else {
        var suite = 'aes' + match[1];
        var iv = Buffer.from(match[2], 'hex');
        var cipherText = Buffer.from(match[3].replace(/[\r\n]/g, ''), 'base64');
        var cipherKey = evp(password, iv.slice(0, 8), parseInt(match[1], 10)).key;
        var out = [];
        var cipher = ciphers.createDecipheriv(suite, cipherKey, iv);
        out.push(cipher.update(cipherText));
        out.push(cipher.final());
        decrypted = Buffer.concat(out);
    }
    var tag = key.match(startRegex)[1];
    return {
        tag: tag,
        data: decrypted
    };
});
